Biochem Module 4 Exam

Biochem Module 4 Exam

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which of the following monosaccharides is not an aldose?



a. erythrose

b. dihydroxyacetone

c. glucose

d. glyceraldehyde

e. ribose - (answer)b. dihydroxyacetone



when two monosaccharides are epimers:



a. they differ only in the configuration about the penultimate carbon

b. one is an aldose, the other a ketose

c. they differ only in the configuration about one carbon atom

d. they form o-glycosidic bonds

e. they are oligosaccharides - (answer)c. they differ only in the configuration about one carbon atom



which pair is anomeric?



a. D-glucose and D-fructose

b. D-glucose and L-fructose

c. D-glucose and L-glucose

d. alpha-D-glucose and beta-D-fructose

e. alpha-D-glucose and beta-D-glucose - (answer)e. alpha-D-glucose and beta-D-glucose



lactose is made from linking galactose and glucose. when this happens:



a. a polysaccharide is formed

, Biochem Module 4 Exam

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b. gas is eliminated

c. an epimer is formed

d. an anomeric carbon is formed on carbon-1

e. lactose forms by a condensation reaction - (answer)e. lactose forms by a condensation reaction



lactose is made from linking galactose and glucose. when this happens:



a. gas is eliminated

b. an anomeric carbon is formed on carbon-1

c. water is released

d. an epimer is formed

e. an aldose is formed - (answer)c. water is released



chitin and cellulose are both polymers of:



a. alpha-D-glucose

b. galactose

c. beta-D-glucose

d. idose

e. maltose - (answer)c. beta-D-glucose



*starch, glycogen, amylose, and amylopectin = alpha-D-glucose



amylose and amylopectin are both polymers of:



a. alpha-D-glucose

b. beta-D-glucose